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Temporal changes in European eel, Anguilla anguilla , stocks in a small catchment after installation of fish passes
Author(s) -
LAFFAILLE P.,
ACOU A.,
GUILLOUËT J.,
LEGAULT A.
Publication year - 2005
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1111/j.1365-2400.2004.00433.x
Subject(s) - anguillidae , fishery , fish <actinopterygii> , biomass (ecology) , upstream (networking) , fish migration , drainage basin , range (aeronautics) , abundance (ecology) , biology , environmental science , geography , ecology , computer network , materials science , cartography , computer science , composite material
Changes in the abundance of European eel, Anguilla anguilla L., in the River Frémur, France, were examined over an 8‐year period. Natural connectivity of the river was disturbed by three high dams that inhibited eel upstream migration and reduced recruitment by elvers and yellow eels. After eel passes were installed, fish became more abundant upstream (mean density 0.5 eel m −2 ). Moreover, except in the more upstream areas, no decline in eel numbers and biomass was found, in contrast to the general decline of eel throughout its distribution range. It was concluded that eel passes are important to conserve and/or to recover eel stocks.